Lava tunnel or Into the Glacier — one is an hour from town, the other is a whole day
Raufarhólshellir lava tunnel vs the man-made ice tunnel inside Langjökull, compared on time, cost, what's underground and who each one suits.
Both of these take you under the surface of Iceland. That’s where the similarity ends. One is a natural lava tube 30 minutes from Reykjavík that you can walk through in an hour. The other is a tunnel cut into the second-largest ice cap in the country, two and a half hours from town before you even start the glacier vehicle. Choosing between them is mostly a question of how much of a day you want to give up.
The Lava Tunnel — Raufarhólshellir
Raufarhólshellir is a lava tube on the road to Þorlákshöfn, about half an hour’s drive southeast of Reykjavík. It formed around 5,000 years ago when a lava flow crusted over and the molten rock inside drained out. What’s left is a tube roughly 1,360 metres long, with a lit walkway through the first section and daylight coming through collapsed sections of the roof. In winter, ice sculptures form under those openings. In summer, it’s green moss and dripping rock.
The standard visit is a guided walk of about an hour on the lit path. It’s easy going: a boardwalk, some uneven rock, a helmet with a headlamp. Children who can walk that far can do it. The meet-on-location version from Arctic Adventures is from €63. If you don’t have a car, the tour with pickup from Reykjavík is from €114 and three hours door to door.
The downside is that it’s a one-hour attraction. The tube is impressive in scale but it’s a dark rock tunnel; if you’ve been in a big cave anywhere, you know the general feeling. Its real strength is how little it costs you in time.
Into the Glacier — Langjökull
Into the Glacier is different in kind. It’s a 500-metre tunnel and set of chambers dug into Langjökull at around 1,200 metres, lit from inside so the blue of the compressed ice shows through the walls. You walk through in crampons for about an hour, with a guide explaining how the ice forms and how fast the glacier is losing it. It is cold in there, a steady few degrees below zero, and it’s dry.
Getting there is the real cost. From Klaki base camp, above Húsafell in West Iceland, Arctic Adventures runs the Into the Glacier tour (from €181, two and a half hours) in a converted glacier truck. Klaki is roughly two and a half hours’ drive from Reykjavík, so that price assumes you’re already in the west, on a self-drive or a Silver Circle day. From town without a car, the Into the Glacier with snowmobiling from Reykjavík is from €347 and ten hours, and adds an hour on a snowmobile on the ice cap before the tunnel.
Two honest caveats. The tunnel is man-made, which some people find takes the shine off; it’s a lit corridor in ice, not a wild ice cave. And weather on Langjökull is not negotiable. The glacier trucks don’t run in storms, and October to April cancellations are common. Build in a spare day if this is important to you.
Our honest take
If you’re in Reykjavík for a few days and want something underground on a half-day, the Lava Tunnel is the easy pick. An hour of walking, home by lunch, done. It’s also the one we’d do with children.
If you’re heading west anyway, to Snæfellsnes or a Húsafell night, book Into the Glacier from Klaki and the ice tunnel becomes a two-and-a-half-hour stop instead of a ten-hour day. That’s the version that makes sense.
Doing the full-day Into the Glacier from Reykjavík only earns its ten hours and €347 if standing inside a glacier is the thing you came for. If it isn’t, you’ll get more from a South Coast day and a proper ice cave in winter.
